Electric trolley-protector.



} Patented Dec. 2. I902. W. W. HOFFMAN & F. W. POWERS.

ELECTRIC TBOLLEY PROTECTOR.

I (Application filed Apr. 18, 1902.; (No Model.)

3 Sheefs-$heet l.

Eltwzufovf Patented Dec. 2 1902 W. W. HUFFMAN &. F. W. POWERS.

ELECTRIC TBOLLEY PROTECTOR.

(Application filed Apr. 18. 1902,;

3 Sheets-Sheet 2.

um Model.)

I y r y/ /l/ l/l "2 9i tncaaeo awe-anew:

m. 715,071; 'Patahted, Dec. 2.1902.

w. w. HOFFMAN & r. w. POWERS.

ELECTRIC TBOLLEY- PROTECTOR.

(Application filed Apr. 18, 1902.;

(No Model.) T 3 Sheets-$haei 3,

Wibv'woow U rrnn STATES PATENT @Frrcn.

\VILLIAM IV. HOFFMAN AND FRANCIS WV. POWERS, OF WEST LAFAYETTE,

INDIANA, ASSIGNOR-S TO ELECTRIC AND STEAM RY. SUPPLY 00. OF LA- FAYETTE, INDIANA.

ELECTRIC TROLLEY-PROTECTOR.

SPECIFICATION forming part of Letters Patent N 0. 715,071, dated December 2, 1902.

Application filed April 1 8,1902.

To a, whom it may concern.-

Be it known that we, WILLIAM W. HOFF- MAN and FRANCIS W. PowERs, citizens of the United States, residing at West Lafayette, in the county of Tippecanoe and State of Indiana, have invented certain new and useful Improvements in Electric Trolley-Protectors; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our present invention relates to improvements in trolley-protectors, and more particularly to that class of such devices adapted to be attached to the trolley-pole rope to automatically draw the pole downto clear the cross-wires or cross-arms suspending the trolley-wire when the trolley-wheel jumps the trolley-wire.

Our invention possesses certain features of novelty and advantage that will hereinafter more fully appear, reference being had to the accompanying drawings, wherein- Figure 1 is a front view of the device, the front of the inclosing case being removed. Fig. 2 is a sectional View taken transversely through the case, parts being omitted for clearness. Fig. 3 is a sectional view taken transversely through the winding-drum,showing the spring-shaft and other parts. Fig. 4 is a side elevation of a trolley-stand adapted to be employed in connection with our in vention. Fig. 5 is a fragmentary view of the trolley-head, showing one form of contact devices carried thereby. Fig. 6 is a similar view showing a modified form of the same. Fig. 7 is a diagrammatic view showing the arrangement of electrical circuits. Fig. 8 is a side elevation of the trolley-head, showing another form of contact device carried thereby. Fig. 9 is is a view of the same, partly in section, showing the same detached from the trolley-head; and Fig. 10 is a detail View of the circuit-closer to be hereinafter described.

In the drawings, A represents a casing rectangular in shape, adapted to entirelyinclose the various parts of the mechanism. This casingAis provided upon its upper side with Serial No. 103,658. (No model.)

a handle or other device A, affording a firm grasp for the hand. In proximity to or carried by this handle A is a hook A the purpose of which will hereinafter appear. a is an angle-shaped catch also carried upon the upper side of the case A.

Bis a receptacle adapted to receive and support this case A. This receptacle is preferably made in the shape of a shelf or bracket having the side portion B. \Vhen this case A is placed in position within the receptacle B, the springs O 0, carried by the case A, will bear against the springs D D, carried upon the back of the receptacle B.

b is a latch-catch adapted to engage the angle-shaped member a, carried upon the top of the case A, thereby securely locking the said case in position. A rubber bufier b may be provided, if desired, against which the case A resiliently rests. Through this means all vibrations, and consequently rattlin g or other noise, are avoided. Within this case A is mounted the transversely-disposed shaft E, preferably journaled in the front and rear of the case. Upon one end of this shaft E is formed the squared end 8, shaped for the reception of a wrench. Upon the same end of the shaft E is slipped the ratchetwheel F, rigidly secured upon theshaft E by means of the screwf.

G is a hollow sleeve slipped over the shaft E and rigidly secured in place by means of the pin g or by any other suitable means resting in the slot 9 of the sleeve G. Upon this sleeve G is rotatably mounted a windingdrum I-I, provided with a grooved periphery h to receive the trolley-rope. Upon the periphery of the drum is also provided a series of ratchet-teeth I. This winding-drum is preferably formed hollow, as shown in Fig. 3 of the drawings, and in the hollow portion of the drum is located a flat coiled spring J, having its outer end secured to the drum, such as by the screw j, and its inner end secured to the sleeve G, such as by the screw j. Adjacent 5 this sleeve G is a second sleeve K, secured to the shaft E by means of a pin 7c or other suitable means resting in the slot 7c of saidsleeve K. At this end of the shaft E, adjacent the Fitted over I00 pin 75, is a reduced portion e.

this reduced portion e of the shaft E is a hub L, provided with the disk Z. Upon the surface of this disk is provided the spiral cam Z, preferably formed by spirally arranged ribs extending out from the side of the disk Z.

M is an annular casing, provideduponone side with the disk Z, such as by screws m, the back of the casing being closed by a back portion, which is rotatably mounted on the sleeve K, a closed casing being thus formed. Within this casing thus formed is inclosed a second fiat coiled springm of greaterstrength than the spring J. The outer end of the spring is secured to the annular casing M, such as by means of the screws on m, and the inner end is secured to the sleeve is, such as by means of the screws m m Upon the periphery of this casing M is an outwardly-projecting lug N, in which is rotatably mounted the stud-shaft n. This shaft 12 is provided with a pawl 'rt offset from said lug N, so as to rest above the ratchet-teeth I of the drum H. n is an oppositely-disposed lug also carried by the stud-shaft n, beneath which rests the free end of a fiat spring n secured upon the casing M, such as by means of the screws 42 n is an upwardly-projecting lug carried by the stud-shaft n.

O is a lever pivotally mounted at 0 to the bracket P. Upon one end of this lever O is provided the detent 0, adapted to engage the projecting lug n of the stud-shaft n. Upon the other end of this lever O is provided an armature 0 Between the end of the lever O and the top of the case A is interposed a helical tension-spring-o to normally retain the detent 0 in engagement with the lug 01 upon the stud-shaft n. Beneath this armature 0 upon the lever O is an electromagnet Q, preferably held stationary by the bracket P, this magnet Q being of sufficient strength to overcome the strength of the spring 0 0 is a laterally-projecting pin carried by the lever 0, the purpose of which will hereinafter appear.

It is a double bell-crank lever, the portion 0" ofwhich is journaled in the bearings 7' r secured upon the top of the case. This bellcrank lever B. has two depending arms r and W, the shorter arm 1' having a dog r adapted to engage the pin 0 upon the lever O at the proper time, and thus hold said lever elevated. The longer arm 4' is somewhat curved and is provided upon its end with the crooked arm W, the function of which will hereinafter appear. A coil-spring r is interposed between the arm r and the top of the case A, giving a tendency to said bell-crank to swing toward the left.

S is a bent lever pivoted ats in the bracket 8', secured to the top of the case A. The opposite end of this lever S extends through the side of the case A. Secured upon the side of the case A are a pair of contacts T T. Between these contacts T T is adapted to rest the metallic or other conductor T carried by and insulated from the lever S.

In the central portion of the lever S is a projecting abutment 8 extending downwardly in the path of the stud-shaft n.

U is a horizontally-disposed lever pivoted at u to the support 11.. This support is provided with a spring portion 1%, supporting the bracket u from the side of the case in such manner that the same will have a tendency to stand away from the same.

U3 is a bracket or staple surrounding the upper end of the support u to limit the outward movement of the same. Arubber buffer a may be inserted in the side of the case A behind the support to, against which said support it is adapted to abut.

Upon the free end of the lever M is pro vided an inwardly-projecting pin it, adapted to rest in the grooves ofthespiral cam l.

u is an arm extending from said lever U, carrying a roller u, adapted to engage the crooked arm r of the bell-crank R.

The spiral cam Zat its inner terminus is provided with an abrupt inwardly-turned portion Z and at its outer end ends suddenly in an abutment Z In the path ofthe stud-shaft 'u, is located a detent 'v, pivotally mounted in the bracket V upon the rock-shaft Q).

o is a striker carried by the rock-shaft, adapted to strike the bell 41 also supported by the bracket V.

v is a helical spring adapted tonormally retain the detent o in the path of the studshaft n.

W is a pawl pivoted to the back of the case A, adapted to engage the teeth of the ratchet F. to is a spring normally pressing said pawl into engagement with said ratchet F.

X is the trolley rope, wound upon the drum H. i 7

Referring particularly to Figs. 8 and 9, 1 represents the trolley-wire, upon which rides the trolley-wh eel 2, journaled in the trolley-wheel harp 3. 4 is a plate shaped to fit over the upper end of the trolley-head and is secured in place by the two-part clamp 5. Upon this plate is secured the clip 7, an insulating medium 6 being interposed between said plate 4. and clip 7. The ends 8 8 of this clip 7 are upturned and perforated, and upon these ends are adapted to fit the ball-shaped sockets 9, provided with the annular flanges 10 and laterally-extending wire 11. These parts are connected together and held resiliently upon their seats upon the clip 7 by means of a coiled spring 12, connecting the same.

In Figs. 5 and 6 somewhat different forms are shown. In these views a stiff or rigid wire 13 is held in place by the bracket 14, the Wire being coiled upon each side of the bracket in the form shown in Fig. 5. In Fig. 6 a plurality of straight wires are clamped upon the trolley-head by the bracket 14.

In Fig. 4 is shown a trolley-stand having IIO certain improvements applied thereto to facilitate the carrying out of our invention. In the view, 15 represents the lower end of the trolley-pole, pivoted at 16 to the stand 17. This stand is provided with the usual extension 18, carrying the coiled spring 19, adapted to be acted upon by the follower 20, connected by the cord or other connection 21 to the quadrant 22 upon the end of the trolleypole 15. 23 is a staple or the like carried by the pole 15, through which passes the wire 24; from the plate 7 at the trolley-head. Upon the vertical portion 25 of the trolley-stand 17 are clamped two insulated semicircular plates 26, held in place by the two-part clamp 27. 28 is a clamp screwed to but insulated from the end of the trolley-stand 17 and carrying the brush 29, adapted to rest upon this semicircular plate 26. The wire 24 from the top of the trolley-pole is connected to the brush, and to each of these semicircular plates 26is connected a wire 30, leading to the contacts D in the brackets B.

In Fig. 7 is shown a diagram of the electrical circuits. In this view, 1 represents the trolley-wire, from which power is supplied to the car-motor through the trolley-pole in the usual manner. Connected to the laterallyprojecting wires carried by the trolley is a wire 30, leading to the contact D. The contact 0, carried upon the case A, completes the circuit with the contact D. Connected to this contact 0 is a wire 31, leading to the contact-pieces T T, adapted to be connected by the switch-piece T through this switch with the electromagnet Q, from which the wire 33 leads to the contact 0, carried by the case A, passing through the contact D of the receptacle B, and is then grounded in any convenient manner, as by connecting the same with the track of the car. Of course if a double trolley using the return-wire is employed this contact D will be connected to the opposite trolley.

The operation of the device is as follows: The case A, containing the various operating parts hereinbefore described, is placed in position in the receptacle B upon the rear end of the car, a receptacle B being provided upon each end of the car for the purpose. The spring J, acting upon the drum H, is of such strength that the springs upon the trolley-stand are of such strength as to overcome it, allowing the trolley-rope X, wound upon said drum, to wind and unwind freely as the pole rises and falls between the trolley-wire supports. When the trolley-pole carrying the trolley-wheel jumps oh": the wire for any reason, the conductors, projecting laterally from each side of the trolley-head below the trolleywheel, will contact with the trolley-wire as the pole bounds upwardly. As these laterally-projecting contacts are connected to the magnet Q, located within the case A, said magnet will be energized, attracting its armature 0 cansing the lever O to tilt, raising the detent 0. This will cause the pin 0, carried by the The wire 32 connectslever O, to rise and rest upon the recessed dog r carried upon the short depending arm r of the double bell-crank R, causing the latter to swing to the left through the action of the spring T The raising of the detent 0, disengaging the same from the lug n of the stud-shaft 'n, will allow the cam-plate lto r0- tate under the action of the spring m. As the detent 0 disengages the lug n upon the stud-shaft 'n the stud-shaft is partially rotated under the influence of the spring a acting under the lateral projection n upon the shaft n, thereby throwing the pawl 12, carried upon the end of the rock-shaft 02, into engagement with the ratchet I upon the drum H. Both springs J and m will now exert their strength upon the drum H and as they rotate will wind the trolley-rope thereon, consequently drawing down the pole, thereby preventing the same from striking the crosswires or cross-arms. As the stud-shaft it starts on its motion around the shaft E the inclined projection 3 upon the lever S, lying in the path of the stud-shaft TL, will be raised, breaking the circuit between the contacts T T, thereby breaking the circuit through the magnet Q. As the cam-plate Z revolves the projection u, resting in the spiral cam L thereon, will traverse the same throughout its length, finally striking against the abutment Z when further rotation of the parts will be arrested. In the path of the studshaft 11,, carried by the rotating parts, is a detent provided with a striker o adapted to strike the bell 12 each time the stud-shaft '27. passes the same. This bell will continue to sound until the trolley-pole has been drawn down, thereby giving an audible signal to the motorman. Instead of employing a signal or alarm device of this character an electric bell may be substituted, such bell being preferably located in proximity to the motorman. Such a device is illustrated in the diagrain in Fig. '7 of the drawings, wherein m is a spring which may be secured to the side of the case, carrying an electrical contact m insulated from said spring by means of the insulation a3. :0 is a stationary contact also secured in the case in position to be engaged by the contact a when the latter is depressed. m is an electric bell which may be suitably located, preferably in proximity to the motorman. This bell is electrically connected to the contact :0 through wire y and to the battery or other source of electrical supply by the wire 1 which in turn is connected to the stationary contact 00 It will thus be seen that when the lug N, carried by the casing M, passes the curved portion of the spring a; the contact 00 carried thereby, will be forced into engagement with the stationary contact 00 thereby completing the circuit through the bell 00 causing the same to ring.

The trolley will be held in the lowered position until the same is allowed to rise through the unwinding of the trolley-rope X. This may be done by applying a wrench to the squared end L of the portion L, connected to the case M, carrying the spring m to overcome the action of the spring, the same being rotated until the abutment u has retraced its steps in the cam Z. When the spring-case is fully wound, the abutment u, upon the lever U will drop into the abrupt curved portion 1* of the cam Z, causing the roller u", carried upon the arm a of said lever U, to engage the crooked end r of the depending arm swinging the same to the right, disengaging the pin 0 from the recessed dog r allowing the detent 0' to drop and engage the lug n upon the stud-shaft 'n. When the action of the spring m is thus released, the tension of the trolley-pole spring will overcome the action of the spring J, acting singly, allowing the rope X to unwind until the pole is again upon the trolley. Should the laterally-projecting arm upon the trolley-head touch the vtrolley-wire during the replacing of I the trolley-pole, the device will not be thrown into action, as the lever S is now in the elevated position, breaking the connection between the switch-points T T. When the trolley has been properly replaced, the switch S is depressed by. its projecting end upon the outside of the case, thereby closing the circuit and setting the device for its next operation.

Instead of using a wrench to reset the de-, vice the same may be dispensed with and the trolley-rope X drawn from the drum H manually, both springs and other parts being thus automatically reset.

Should it become necessary to strengthen or otherwise adjust the springs, a wrench is applied to the squared end 6 of the shaft E, the ratchet F retaining the shaft in its adjusted position.

When the direction of the car is to be reversed and only one trolley is provided in the center of the car, the trolley-rope X is hooked beneath the catch A The catch 2) is now released and the device removed and replaced in a receptacle B upon the other end of the car, a handle A being provided for the purpose.

Should the car be provided with a trolley upon each end for running in opposite directions, one of these devices may be provided for each trolley and, if desired, may be per manently secured upon the car, as isobvious. In this case the trolley-rope X, secured to the trolley not in use, may be drawn down and secured beneath the hook A The winding upon the magnetispreferably of high resistance to prevent a heavy-flowing current through the same, or, if desired, the same result may be obtained by inserting a resistance in the circuit. In this way the parts may be comparatively small without danger of destruction from an excessive flow of current.

The form of device shown in Figs. 8 and 9 is preferably employed upon the back of the trolley-head. When the trolley-wheel jumps the trolley-wire, these insulated conductors projecting from the side of the trolley-pole head strike the trolley-wire. As these conductors are flexibly poised, the same will act in the manner shown in Fig. 9, allowing the trolley-wire to slip past the same after a current has been sent down through the circuit, and when the pole is being drawn down it will not be hindered by these wires catching upon the trolley-wire. Figs. 5 and 6 show simpler alternative forms, which may be employed if desired.

While we have embodied an invention in the form herein shown, it will be understood that we do not'so limit ourselves, as many modifications and suggestions might suggest themselves to those skilled in the art, which changes might be made without departing from the spirit of our invention.

Having thus described our invention, what we claim, and desire to secure by Letters Patent of the United States, is

1. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, of a winding-drum upon which one end of said rope is wound, means for exerting a yielding force upon said drum tending to wind said drum, supplemental means adapted to be thrown into engagement with said drum to wind said trolley-rope upon said drum when the trolley-wheel leaves the trolley-wire, and electromagnetically-operated mechanism connected to said conductors for throwing said parts into operation.

2. In a device of the characterdescribed, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, and means connected to said conductors for automatically throwing said second spring into action with said drum when the trolley-wheel leaves the trolleywire.

3. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, of a winding-drum upon which the end of said trolley-rope is wound,

a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, and electrically-operated means connected to said conductors for throwing said second spring into action with said drum when the trolley-wheel leaves the trolley-wire.

4:. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, and electromagnetically-operated means connected to said conductors and interposed between said drum and second spring for throwing said second spring into action with said drum when the trolleywheel leaves the trolley-wire.

5. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole,of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, automatically-controlled electromagnetically-operated means con nected to said conductors and interposed between said drum and second spring for throwing said second spring into action with said drum when the trolley-wheel leaves the trolley-wi re.

6. In a device of the character described, the combination with the trolley-pole and the trolley wheel and rope attached thereto; and insulated electrical conductors carried upon said trolley-pole, of a drum upon which the end of said trolley-rope is wound, a spring acting upon said drum, a second spring of greater strength, means connected to said conductors adapted to connect said second spring and drum, and means for automatically throwing said connecting mechanism into operation.

7. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby, and current-conductors carried thereby but insulated therefrom; of a winding-drum upon which the end of said rope is wound, a spring acting upon said drum, a second spring, and electrical means connected to said currentconductors upon the trolley-pole, adapted to automatically throw said second spring into action with said drum.

8. In a device of the character described, the combination with the trolley-pole, the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, of a winding-drum upon which the free end of said trolley-rope is attached, a spring attached to said drum tending to wind said trolley-rope, a second spring, a ratchet carried by said drum, a pawl carried by said second spring, and means operated through said conductors for releasing said second spring and throwing said pawl into engagement with said ratchet.

9. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolleypole, of a winding-drum upon which the free end of said trolley-rope is attached, a spring attached to said drum tending to wind said trolley-rope, a second spring,

a ratchet carried by said drum, a pawl carried by said second spring, and automatically-operated means electrically connected to said conductors for releasing said second spring and throwing said pawl into engagement with said ratchet.

10. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; and insulated electrical conductors carried upon said trolley-pole, ofa winding-drum upon which the free end of said trolley-rope is attached, a spring attached to said drum tending to wind said trolley-rope, a second spring, a ratchet carried by said drum, a pawl carried by said second spring, and electromagnetically-operated means connected to said conductors for releasing said second spring and throwing said pawl into engagement with said ratchet.

11. In a device of the character described, the combination with the trolley-pole, the trolley wheel and rope, and electrical contacts projecting laterally from the trolleyhead; of a winding-drum upon which is wound the free end of the trolley-rope, means normally tending to wind said rope upon said drum, auxiliary winding means, and means operated through said electrical contacts for connecting said auxiliary means with said drum to wind said trolley-rope.

12. In a device of the character described, the combination with the trolley-pole, the trolley wheel and rope, and electrical contacts projecting laterally from the trolleyhead, of a winding-drum upon which'is wound the free end of the trolley-rope, means tending to wind said rope upon said drum, auxiliary winding means adapted to be connected to said drum, and electromagnetically-operated means operated through said electrical contacts for connecting said auxiliary means with said drum.

13. In a device of the character described, the combination with the trolley-pole, the trolley-rope and insulated electrical contacts projecting laterally from the head of said trolley-pole; of a drum upon which the end of said trolley-rope is wound, means normally tending to wind said rope, auxiliary means for winding said drum, mechanism adapted to connect said auxiliary means with said drum, and electromagnetically-operated mechanism in circuit with said electrical contacts upon the trolley-head, adapted to throw said connecting mechanism in operation.

14. In a device of the character described, the combination with the trolley-pole, the trolley-rope, and laterally-projecting insulated contacts carried upon the head of said pole; of means connected to said trolley-rope and electrically connected to said contacts adapted to automatically draw said trolleypole down when said wheel jumps the trolley wire.

15. In a device of the character described, the combination with the trolley-pole carrying the trolley-wheel, the trolley-rope, and flexible electric contacts supported and insulated from the head. of the trolley-pole; of mechanically-operated means for winding the end of said trolley-rope, and electrically-operated means connected to said contacts adapted to automatically throw said mechanical means into operation to draw down the trolley-pole. I

16. In a device of the character described, the combination with the trolley-pole, the trolley-rope, electrical contacts carried upon the head of said trolley-pole, and a receptacle carried upon the car provided with electrical contacts connected to the contacts upon the trolley-pole; of a case adapted to be seated in said receptacle, electrical contacts carried thereby adapted to bear upon the contacts in said receptacle, mechanical means carried within said case for winding said trolley-rope, and electromagnetically-operated means connected through said contacts with the contacts upon the pole for automatically throwing said mechanical mechanism into operation to draw down the trolley-pole.

17'. In a device of the character described, the combination with the trolley-pole and trolley-wheel carried thereby, the trolley-rope, and insulated electrical contacts carried thereby, electrical contacts upon the car connected to the contacts upon the pole; of a case adapted to be carried by the car, contacts carried by said case adapted to register with said contacts upon the car,mechanicallyoperated means for winding said trolley-rope, mechanism adapted to throw said winding mechanism into action, and electromagnetically-operated mechanism carried by said case, adapted to control said winding mechanism.

18. In a device of the charactor described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electricalcontacts carried upon the'head of said trolley-pole; of a winding-drum upon which one end of said rope is wound, a spring connected to said drum tending to rotate said drum to wind said rope, a second spring, a spring-case inclosing said spring, a ratchet carried by said drum, a stud-shaft carried by said spring-case, a pawl carried by said studshaft adapted to engage the ratchet upon said drum, a lever normally retaining said pawl out of engagement with said ratchet, and also retaining said spring-case against rotation, and magnetically-operated means connected to the electrical contacts upon said trolleyhead for raising said lever to release said second spring and to throw said pawl and ratchet into engagement.

19. In a device of the character described, the combination with the trolley-pole, trolley .wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a winding-drum upon which one end of said rope is wound, a spring connected to said drum tending to rotate said drum to wind said rope, a second spring, a spring-case inclosing said spring, a ratchet carried by said drum, a stud-sha ft carried by said spring-case, a pawl carried by said studshaft adapted to engage the ratchet upon said drum, a lever normally retaining said pawl out of engagement with said ratchet, and also retaining said spring-case against rotation, a magnet for releasing said lever, a spiral camdisk carried by said spring-case, a lever having an abutment projecting into said cam, adapted to limit the rotation of said springcase, and a signal device adapted tobeactuated during the rotation of said spring-case.

20. In 'a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of the trolley-pole; of a winding-drum upon which one end of said rope is wound, a spring connected to said drum tending to rotate said drum to wind said rope, a second spring, a spring-case inclosing said spring, a ratchet carried by said drum, a stud-shaft carried by said spring-case, a pawl carried bysaid studshaft adapted to engage the ratchet upon said drum, a lever normally retaining said pawl out of engagement with said ratchet, and also retaining said spring-case against rotation, a magnet for releasing said lever, a circuitbreaker in circuit with said magnet, adapted to automatically break the circuit during the rotation of said spring-case, a spiral-cam-disk carried by said spring-case, adapted to limit the rotation of said spring-case, and a signal adapted to be sounded during the rotation of said spring-case.

21. The combination with a trolley-pole; of flexible insulated electrical contacts carried upon the head thereof.

22. The combination with a trolley-pole; of

laterally-projecting insulated electrical conductors yieldingly supported from the head of the trolley-pole.

23. The combination with a trolley-pole, and-the trolley-wheel adapted to receive the electrical power from the trolley-wire; of insulated conductors flexibly supported and extending laterally from the trolley-head,adapted to receive current from the trolley after the trolley-wheel has left it.

24. The combination with a trolley-pole; of an insulated plate secured upon said pole, and electrical contacts carried thereby.

25. The combination with the trolley-pole; of an insulated plate secured upon the head of said pole, and flexible electrical contacts carried by said plate.

26. The combination with the trolley-pole, and trolley-harp; ot a plate having its upper end secured to said trolley-harp, a clamp securing the lower end of said plate, an insulated plate secured to the first plate, and flexible electrical conductors carried by said insulated plate and projecting laterally from the trolley-head.

27.. In a device of the character described,

the combination with the trolley-stand having a cylindrical standard or baseportion, of a pair of insulated semicircular conductors, an insulated clamp securing said conductors upon the cylindrical standard, and a brush carried upon the upper rotating portion of said stand, adapted to sweep over said coudnctors upon the lower portion of the stand.

28. In a device of the character described, the combination with the trolley-stand having a cylindrical standard or base portion; of a pair of insulated semicircular conductors, an insulated clamp securing said conductors upon the cylindrical portion of said stand, a clamp insulated from and secured upon the upper rotating portion of said stand, and a brush carried by said clamp adapted to sweep over said conductors upon the lower portion of the stand.

29. In a device of the character described, the trolley-pole, comprising a trolley-stand having a lower cylindrical portion, a pair of semicircular conducting-segments clamped upon and insulated from said cylindrical portion, an upper rotating portion, an insulated clamp carried upon said upper rotating portion, a brush carried by said clamp adapted to sweep over said segmental conductors upon the lower portion, laterally-projecting electrical conductors carried upon the trolleyhead, and electrical connection between said electrical conductors and the brush.

30. The combination with the trolleypole; of an insulated plate secured upon the head of the pole, perforated upturned ends upon said plate, ball-sockets adapted to be seated upon said upturned ends, and laterally-projecting wires carried by said ball-sockets.

31. The combination with the trolley-pole; of an insulated plate, secured upon the head of the pole, perforated upturned ends upon said plate, ball sockets adapted to be seated upon said upturned ends, a spring connecting said ball-sockets adapted to retain them upon their seats, and laterally-projecti ng wires carried by said ball-sockets.

32. The combination with the trolley-pole5 of an insulated plate removablysecured upon the head of said trolley, perforated upturned ends upon said plate, flanged ball-sockets seated upon said upturned ends, wires projecting from said ball-sockets, a hook or eyelet upon each of said balls, and a spring attached to said hook or eyelet tending to resiliently retain said ball-sockets upon their seats.

33. The combination with the trolley-pole; of an insulated plate adapted to fit the head thereof, and having a rounded lower extension, a clamp adapted to encircle said rounded extension and clamp said plate upon the pole, perforated upturned portions upon said plate, ball-sockets seated upon said upturned ends, a spring interposed between said ballsockets adapted to retain said ball-sockets upon their seats, and laterallyprojecting wires carried by said ball-sockets.

34. In a device of the character described, the combination with the trolley-pole, trolle wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and easing, a sleeve carried by said shaft, a winding-drum mounted on said sleeve, a spring interposed between said sleeve and winding-drum, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a spring case rotatably mounted on said second sleeve a pawl carried by said spring-case adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said springcase, a detent normally retaining said pawl out of engagement with said ratchet, and also retaining said case against rotation, and electromagnetically-operated mechanism electrically connected to said contacts upon the trolley-pole, adapted to release said detent.

35. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing,a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and easing, a sleeve carried by said shaft, a winding'drum mounted on said sleeve, a spring interposed between said sleeve and winding-drum, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a pawl carried by said springcase adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said spring-case, a detent normally retaining said pawl out of engagement with said ratchet, and also retaining said case against rotation, a spiral cam having an abutment at one end, carried by said spring-case, a lever mounted upon said case, a stop carried by said lever adapted to enter said spiral cam, and electromagnetically-operated mechanism, electrically connected to said contacts upon the trolley-pole, adapted to release said detent.

36. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and casin g, a sleeve carried by said shaft, awinding-drnm mounted on said sleeve, a spring interposed between said sleeve and winding-drum, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a springcase rotatably mounted on said IIO second sleeve, a pawl carried by said springcase adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said spring-case, a detent normally retaining said pawl out of engagement with said ratchet, and also retaining said case against rotation, electromagnetically-operated mechanism electrically connected to said contacts upon the trolley-pole, adapted to release said detent, a circuit-breaker in circuit with said electromagnetically-operated mechanism, and means carried by said spring-case adapted to operate said circuit-breaker during the rotation of said spring-case.

37. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of the trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and casing, a sleeve carried by said shaft, a winding-drum mounted on said sleeve, aspringinterposed between said sleeve and winding-drum, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a pawl carried by said springcase adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said spring-case, a detent normally retaining said case against rotation,

electromagnetically operated mechanism electrically connected to said contacts upon the trolley-pole, adapted to release said detent,a circuit-breaker in circuit with said electromagnetically-operated mechanism, means carried by said spring-case adapted to operate said circuit-breaker during the rotation of said spring-case, and means for automatically returning the parts to their original position during the resetting of the trolley-wheel upon the wire.

38. In a device ofthe character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and casing, a sleeve carried by said shaft, a Winding-drum mounted on said sleeve, a spring interposed between said sleeve and winding-drum, aratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a pawl carried by said springcase adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said spring-case, a detent normally retaining said pawl out of engagement with said ratchet, an armature upon one end of said detent, a magnet adapted to attract said armature when energized, a double bellcrank lever supported by said casing,a recessed dog carried thereby, a pin projecting from said detent adapted to be held raised by said recessed dog when said armature is attracted by said magnet, means for releasing said dog from engagement with said'pin during the resetting of the parts, electrical connections between said magnet and the contacts upon said trolley-pole, and a circuitbreaker adapted to be operated to break the circuit through said magnet.

39. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a'casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and easing, a sleeve carried by said shaft, a winding-d rum mounted on said sleeve, a spring interposed between said sleeve and winding-drum, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft,jpins entering said shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a pawl carried by said springcase adapted to engage the ratchet upon said drum, a spring interposed between said second sleeve and said spring-case, a detent normally retaining said pawl out of engagement with said ratchet, and also retaining said case against rotation, means electrically connected to said contacts upon the trolley-pole, for antomatically releasing said detent,a pair of stationary contacts upon said case, connected in the circuit between said contacts upon the pole and said magnet, a pivoted lever carrying means for completing the circuit between said contacts, means carried by said springcase adapted to automatically raise said lever and break the circuit during the rotation of said spring-case, and means for limiting the rotation of said spring-case when released.

40. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and casing, a sleeve carried by said shaft, a winding-drum mounted on said sleeve, a spring interposed between said sleeve and winding-drum, a ratchet carrled by said winding-drum, a second sleeve mounted upon said shaft, pins entering said shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a pawl carried by said spring- IOC ' upon the pole and said magnet, a pivoted lever carrying means for completing the circuit between said contacts, means carried by said spring-case adapted to automatically raise said lever and break the circuit during the rotation of said spring-case, a spiral cam carried by said spring-case, a lever pivoted upon the side of the case, a buffer behind said lever, an abutment carried by said lever adapted to follow said spiral cam, and an abutment at the end of said spiral cam adapted to abut against the abutment upon said lever and arrest the rotation of the spring-case.

41. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and pawl mechanism interposed between said shaft and casing, a slotted sleeve carried by said shaft, a windingdrum, mounted on said sleeve, a spring interposed between said windingdrum and sleeve, a ratchet carried by said windingdrum, a second sleeve mounted upon said shaft, pins carried by the shaft and securing said sleeves against rotation, a spring-case rotatably mounted on said second sleeve, a rock-shaft mounted upon said spring-case, a pawl carried by said rock-shaft adapted to engage the ratchet upon said winding-drum, a spring interposed between said second sleeve and said spring-case, a pivoted lever carried by the case, a detent upon one end of said lever adapted to engage an abutment carried by said rock-shaft adapted to normally retain said pawl out of engagement with said ratchet upon said Winding-drum and also retain said spring-case against rotation, magnetically-operated mechanism connected to the contacts upon the trolley-pole, adapted to raise said detent, a projecting pin carried by said lever, a double bell-crank lever pivoted in the casing having a recessed dog adapted to engage said pin to retain said detent in its raised position, a depending crooked arm carried by said bell-crank lever, a circuit-breaker pivoted in said casing, provided with a depending portion adapted to be engaged by said rock-shaft upon the springcase to break the circuit with said magnetically-operated mechanism, a spiral cam carried by said spring-case, having an abutment at one end and an abrupt inward turn at its opposite end, a lever pivotally supported from said casing, a projection carried thereby adapted to follow said cam, an extension carried by said pivoted lever having a roller adapted to roll upon said crooked arm of the bell-crank lever, to release said pin from said dog when said projection rests in said inwardly-turned portion of said cam, the motion of said spring-case being arrested when said projection strikes said abutment, and a signal device adapted to be thrown into action when said spring-case is released.

42. In a device of the character described,

the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated contacts carried upon the head of said trolley-pole; of a winding-drum upon which one end of said rope is wound, a spring connected to said drum tending to rotate said drum to wind said rope, a second spring, a spring-case inclosin g said spring, a ratchet carried by said drum, a stud-shaft carried by said springcase, a pawl carried by said stud-shaft adapted to engage the ratchet upon said drum, a lever normally retaining said pawl out of engagement with said ratchet, and also retaining said spring-case against rotation, a magnet for releasing said lever, a spiral camdisk carried by said springcase, a lever hav-- ing an abutment projecting into said cam, adapted to limit the rotation of said springcase, an electric bell, and means for completing a circuit through said bell during the rotation of said spring-case.

43. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated contacts carried upon the head of said trolley-polc; of a winding-drum upon which one end of said rope is wound, a spring connected to said drum tending to rotate said drum to wind said rope, a second spring, a spring-case inclosing said spring, a ratchet carried by said drum, a stud-shaft carried by said springcase, a pawl carried by said stud-shaft adapted to engage the ratchet upon said drum, a lever normally retaining said spring case against rotation, a magnet for releasing said lever, a spiral cam-disk carried by said springcase, a lever having an abutment projecting into said cam, adapted to limit the rotation of said spring-case, an electric bell, a curved lever adapted to be depressed by said studshaft during the rotation of said spring-case, a contact carried by said spring, a stationary contact, and an electrical circuit connected to said bell adapted to be closed through said contacts.

44. In a device of the character described, the combination with the trolley-pole, trolley wheel and rope carried thereby, and insulated electrical contacts carried upon the head of said trolley-pole; of a casing, a shaft mounted therein, a ratchet-and-pawl mechanism interposed between said shaft and easing, a slotted sleeve carried by said shaft, a windingdrum, mounted on said sleeve, a spring interposed between said winding-drum and sleeve, a ratchet carried by said winding-drum, a second sleeve mounted upon said shaft, pins carried by the shaft and securing said sleeves against rotation, a spring case rotatably mounted on said second sleeve, a rock-shaft mounted upon said spring-case, a pawl carried by said rock'shaft adapted to engage the ratchet upon said Winding-drum, a spring interposed between said second sleeve and said spring-case, a pivoted lever carried by the case, a detent upon one end of said lever adapted to engage an abutment carried by said rock-shaft adapted to normally retain said pawl out of engagement with said ratchet upon said winding-drum and also retain said spring-case against rotation magnetically-operated mechanism connected to the contacts upon the trolley-pole, adapted to raise said detent, a projecting pin carried by said lever, a double bell-crank lever pivoted in the easing having a recessed dog adapted to engage said pin to retain said detent in its raised position, a depending crooked arm carried by said bell-crank lever, a circuit-breaker pivoted in said casing, provided with a depending portion adapted to be engaged by said rock-shaft upon the spring-case to break the circuit withsaid magnetically-operated mechanism, a spiral cam carried by said springcase, having an abutment at one end and an abrupt inward turn at its opposite end, a lever pivotally supported from said casing, a projection carried thereby adapted to follow said cam, an extension carried by said pivo ed lever having a roller adapted to roll upon said crooked arm of the bell-crank lever, to release said pin from said dog when said'projection rests in said inwardly-turned portion of said cam, the motion of said spring-case.

being arrested when said projection strikes said abutment, and a signal device adapted to be thrown into action during the rotation of said spring-case, comprising an electric bell, adapted to be located at a distance, a curved spring in-the path of and adapted to be depressed by said stud-shaft,an insulated contact carried by said spring, and electrically connected to said bell, a stationary contact adapted to be engaged by the contact upon said spring when the same is depressed, and a source of electrical supply connected to said stationary contact and to said hell.

45. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; of a winding-drum upon which the end of said trolley-rope is Wound, a spring acting upon said drum normally tending to wind the same, a second spring adapted to be connected to said drum, means for automatically throwing said second spring into action with said drum when the trolley-wheel leaves the trolleywire, an electric bell adapted to be located near the motorman, and means for automatically throwing said bell into action when the trolley is being drawn down from the wire.

46. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, electrically-operated means for throwing said second springinto action with said drum when the trolley-wheel leaves the trolley-wire, an electric bell, located at a distance, a pair of electrical contacts adapted to be connected during the winding of said drum, and an electrical circuit connected to said bell and adapted to be completed through said contacts, causing said bell to ring while the trolleywheel is being withdrawn from the trolleywire.

47. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, electromagnetically-operated means interposed between said drum and second spring for throwing said second spring into action with said drum when the trolley-wheel leaves the trolley-wire, an electric bell adapted to be located at a distance, and an electric circuit adapted to be closed through said bell, dur* ing the winding of said drum.

48. In a device of the character described, the combination with the trolley-pole, and the trolley wheel and rope carried thereby; of a winding-drum upon which the end of said trolley-rope is wound, a spring acting upon said drum to wind the same, a second spring adapted to be connected to said drum, automatically-controlled electromagnetically-operated means interposed between said drum and second spring for throwing said second spring into action with said drum when the trolley-wheel leaves the trolley-wire, an electric hell or signal, an electrical circuit connecting said bell and a source of current-supply, and automatically-controlled contacts interposed in said electrical circuit, adapted to close the circuit through said bell or signal during the winding of said drum.

In testimony whereof we-affix our signatures in presence of two witnesses. WILLIAM W. HOFFMAN.

FRANCIS W. POWERS. Witnesses:

SCOTT SHoBE, OHAs. T. STALLARD. 

